Using Extension Functions - Its Efficiency

I am using JDK1.4 API for Transformation, which uses Xalan-Java internally.

Is it a good idea using Extensions functions in Java language. I found
myself very uncomfortable when I have complicated string processing in xsl.
So, I am implementing those in Java language and calling them from XSLs.

I also use Xalan's built in functions, like tokenize(), when ever available.

Is that a bad practice? Does it add any performance hit? And is it bad
memory-wise?

Any suggestions would be appreciated!

Thanks,

Pramodh.


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